ESB MULE passing the parameters to the java method

问题:

I use MULE version 3.3.0 CE, I want to get some value from header in inbound and then pass it to a java method, in java method making some changes on passed value, finally again I pass it from java method to the outbound????

回答1:

Instead of tying your Java beans to the Mule API (with Callable), you can do this using MEL only, for example with:

<invoke object-ref="yourBean"         method="yourMethod"         methodArguments="#[message.inboundProperties['inboundPropertyName']]" />  <set-property propertyName="outboundPropertyName"               value="#[payload]" /> 

This has the caveat that the message payload is affected by the invoke element. If this is a problem then you can go with:

<expression-component>     propVal = app.registry.yourBean.yourMethod(message.inboundProperties['inboundPropertyName']);     message.outboundProperties['outboundPropertyName'] = propVal; </expression-component> 

回答2:

1. Make your Java component implement org.mule.api.lifecycle.Callable

2. In its onCall you can get the message as follows:

   MuleMessage message = eventContext.getMessage();

3. Now you can obtain the inbound properties:

   Object someProp = message.getInboundProperty("some_prop_name");

4. After operating over it, you place it back as an outbound property:

   message.setOutboundProperty("some_prop_name", someProp);

文章来源: ESB MULE passing the parameters to the java method